Zyxel NBG2105 V1.00(AAGU.2)C0 devices are susceptible to authentication bypass vulnerabilities because setting the login cookie to 1 provides administrator access.
id: CVE-2021-3297
info:
name: Zyxel NBG2105 V1.00(AAGU.2)C0 - Authentication Bypass
author: gy7
...